• 제목/요약/키워드: CAD standard

검색결과 309건 처리시간 0.027초

매크로 파라메트릭 방법론은 이용한 CAD 모델의 교환 (Exchange of CAD Models Using Macro Parametric Approach)

  • 문두환;한순흥
    • 한국CDE학회논문집
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    • 제6권4호
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    • pp.254-262
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    • 2001
  • It is not possible to exchange parametric information of CAD (Computer Aided Design) models based on the current version of STEP (Standard leer the Exchange of Product model data). The design intent can be lost during the STEP transfer of CAD models. The ISO Parametrics Group has proposed the SMCH (Solid Model Construction History) schema in June 2000 that includes structures fur exchange of parametric information. This paper proposes the macro parametric approach that is intended to provide capabilities to transfer parametric information. In this approach, CAD models are exchanged in the form of macro files. The macro file contains user commands which are used in the modeling phase. To exchange CAD models using the macro parametric approach, modeling commands of commercial CAD systems are analyzed. Those commands are classified by the grouping method suggested by Bill Anderson. As a neutral file format, a standard modeling commands set has been defined. Mapping relations between the standard modeling commands set and the native modeling commands set of commercial CAD systems are defined.

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An Integrated ECAD Library System for Standard Part Management in a Heterogeneous ECAD Environment

  • Yoo, Byung-Hoon;Lee, Hwa-Jong;Rho, Ho-Chang
    • 산업공학
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    • 제7권1호
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    • pp.67-74
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    • 1994
  • In this study, we propose an integrated CAD(Computer Aided Design) library database in a heterogeneous commercial ECAD(Electronic CAD) environment. To effectively solve engineering problems focused on BOM data extraction we use a software system called schematic capture and company-wide standard electronic part information loaded on different commercial ECADs. We unify many commercial ECADs into one schematic capture and a variety of PCB(Printed Circuit Board) design tools. For this purpose we develope a model for linking CAD symbol library with company-wide standard part information. We also develope a schematic design data conversion scheme and show how to extract PBA level BOM data using our customized schematic capture. This system is being operated in an X-Window based engineering work station and commercial RDBMS base.

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피처 트리와 매크로 파일을 이용하는 하이브리드 파라메트릭 번역기 (A Hybrid Parametric Translator Using the Feature Tree and the Macro File)

  • 문두환;김병철;한순흥
    • 한국CDE학회논문집
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    • 제7권4호
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    • pp.240-247
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    • 2002
  • Most commercial CAD systems provide parametric modeling functions, and by using these capabilities designers can edit a CAD model in order to create design variants. It is necessary to transfer parametric information during a CAD model exchange to modify the model inside the receiving system. However, it is not possible to exchange parametric information of CAD models based on the cur-rent version of STEP. The designer intents which are contained in the parametric information can be lost during the STEP transfer of CAD models. This paper introduces a hybrid CAB model translator, which also uses the feature tree of commercial CAD systems in addition to the macro file to allow transfer of parametric information. The macro-parametric approach is to exchange CAD models by using the macro file, which contains the history of user commands. To exchange CAD models using the macro-parametric approach, the modeling commands of several commercial CAD systems are analyzed. Those commands are classified and a set of standard modeling commands has been defined. As a neutral fie format, a set of standard modeling commands has been defined. Mapping relations between the standard modeling commands set and the native modeling commands set of commercial CAD systems are defined. The scope of the current version is limited to parts modeling and assemblies are excluded.

3차원 CAD라이브러리를 이용한 프레스 금형 부품의 설계 (A Design of Press Die Components by Use of 3D CAD Library)

  • 박철현;이성수
    • 한국CDE학회논문집
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    • 제9권4호
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    • pp.373-381
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    • 2004
  • Using standard components of a press die is recognized as a way for a cost reduction and a short lead time. It also provides a way for a quick maintenance of a die under repair. It is expected to contribute to integration of CAD/CAM system for manufacturing dies in the future. This paper presents a 3D CAD library which is constructed using the standard components and is used for designing a press die. This 3D CAD library is generated by a database system made of Microsoft Access for standard components and by CATIA V5 R10 API for geometric features. The library is implemented using Visual Basic 6.0 utility of CATIA API function in the Windows NT environment. It creates a 3D model of the standard components of press die easily when a die designer inputs numerical values of geometric features and the BOM of the completely assembled parts. It also generates automatically the assembly drawing of die set by using variables for standard values of die parts. Therefore users can save the cost of time to design the press die components, and even a beginner can use this program with ease. The test results of the 3D CAD library for designing shearing and bending dies verify its usefulness and feasibility.

Exchange of CAD Part Models Based on the Macro-Parametric Approach

  • Choi, Guk-Heon;Mun, Du-Hwan;Han, Soon-Hung
    • International Journal of CAD/CAM
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    • 제2권1호
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    • pp.13-21
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    • 2002
  • It is not possible to exchange parametric information of CAD models based on the current version of STEP. The design intent can be lost during the STEP transfer of CAD models. The Parametrics Group of ISO/TC184/SC4 has proposed the SMCH schema, which includes constructs for exchange of parametric information. This paper proposes a macro-parametric approach that is intended to provide capabilities to transfer parametric information including design intents. In this approach, CAD models are exchanged in the form of macro files. The macro file contains the history of user commands, which are used in the modeling phase. To exchange CAD models using the macro-parametric approach, the modeling commands of several commercial CAD systems are analyzed. Those commands are classified and a set of standard modeling commands has been defined. Mapping relations between the standard modeling commands and the native modeling commands of commercial CAD systems are defined. The scope of the current version is limited to parts modeling, not assemblies.

STEP을 이용한 분산 CAD/CAE 환경 (Distributed CAD/CAE Environment Using STEP)

  • 권기억;박명진;조성옥
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 춘계학술대회 논문집
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    • pp.395-399
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    • 1997
  • An international standard for the product model data, STEP, and a standard for the distributed object technology. CORBA, will play a very important role in the future manufacturing environment. These two technologies provide background for the sharing of product data and the integration of applications on the network. This paper describes a prototype CAD/CAE enviroment that is integrated on the network by STEP and CORBA. Several application servers and client software were developed to verify the proposed concept.

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항만분야 수용을 위한 전자도면 작성표준 확장 개발 (Extension of Korea Standard of the CAD Drawings in Construction CALS/EC to Adopt the Port Field)

  • 문진석;한충한
    • 한국콘텐츠학회논문지
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    • 제13권11호
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    • pp.957-967
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    • 2013
  • 건설사업의 기획, 설계, 시공, 유지관리 등 생애주기 동안 방대한 분량의 전자도면이 생성되고 있으나, 비표준화 도면의 작성 및 유통으로 건설 주체 간 의사교환, 각 사업단계별 도면의 재활용 및 유지관리에 어려움을 겪고 있다. 건설분야 전자도면의 작성표준을 제시하는 건설CALS/EC 전자도면 작성표준의 특징은 선(線) 형태의 도로, 하천 및 철도분야와 단위 건축물 중심의 작성표준 체계로 구성되어 표준에 따른 전자도면 작성이 가능하다. 이에 반하여, 항만, 택지 및 부지 등과 같이 다중의 시설이 복합적으로 면(面)형태로 구성된 건설대상에 적용하기에 어려움이 있다. 특히 항만시설의 경우 일정한 연안지역에 배치된 복수 항의 목적에 따른 복합적인 부두, 시설 등으로 구성된다. 또한 배후부지와 같은 택지개념이 포함되어 있으며, 다수의 토목시설, 건축시설 및 항만 전용 시설 등으로 복합 구성되어 기존의 전자도면 작성표준의 활용이 어려운 실정이다. 이에 본 논문에서는 항만분야 수용을 위한 전자도면 작성표준의 확장 개발연구를 수행하며, 개발을 통해 도면정보관련 정보화 효율을 극대화하고, 궁극적으로 건설분야 설계정보의 원활한 정보교환이 가능하도록 하였다.

CAD 모델 교환을 위한 매크로 파라메트릭 정보의 XML 표현 (A Macro Parametric Data Representation far CAD Model Exchange using XML)

  • 양정삼;한순흥;김병철;박찬국
    • 대한기계학회논문집A
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    • 제27권12호
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    • pp.2061-2071
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    • 2003
  • The macro-parametric approach, which is a method of CAD model exchange, has recently been proposed. CAD models can be exchanged in the form of a macro file, which is a sequence of modeling commands. As an event-driven commands set, the standard macro file can transfer design intents such as parameters, features and constraints. Moreover it is suitable for the network environment because the standard macro commands are open, explicit, and the data size is small. This paper introduces the concept of the macro-parametric method and proposes its representation using XML technology. Representing the macro-parametric data using XML allows managing vast amount of dynamic contents, Web-enabled distributed applications, and inherent characteristic of structure and validation.

자동차금형의 생산공정에서 요소기술 및 CAD/CAM시스템의 표준모델 (A Component Technology and the Standard Model of CAD/CAM System in Production Process of Automobile Dies)

  • 한규택
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 춘계학술대회 논문집
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    • pp.957-961
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    • 1997
  • In this paper, an assessment has been proceeded about component technology that stamping car panel can be designed and manufactured efficiently. Also this study investigated srandard model of CAD/CAM system in production process of automobile dies. Recently, motor companies are doing their best to increase productivity and to reduce production time. So to develop user-friendly and effective standard model of CAD/CAM system is very important. The obtained results will lead to the reductions in lead time and man-hour required for the design and manufacture of the automobile dies.

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